Research On Cognitive Diagnosis Of High School Chemical Balance Based On DINA Model

"Change concept and balanced thinking" is one of the important dimensions of the core literacy of high school chemistry.The chemical balance knowledge is complex and difficult to learn,which brings many difficulties to students’ learning.Scholars have conducted fruitful research on the measurement of students’ knowledge of chemical balance.However,most of the studies only report the students’ achievements from the macro level,and did not diagnose the detailed and detailed cognitive structure of the students.Cognitive diagnostic measurement not only reports the student’s performance from a macro level,but also diagnoses the student’s detailed and specific cognitive structure and provides a more comprehensive and detailed diagnosis.This study is based on the DINA model to carry out the cognitive diagnosis of chemical balance,and to analyze the cognitive development of high school students in the chemical balance content,in order to propose targeted teaching suggestions for the teaching of chemical balance.This study first by looking at the balance of high school chemistry cognitive survey of related literature at home and abroad,analysis of the ordinary high school chemistry curriculum standards(2017 edition),the ordinary high school curriculum standard experiment textbook,balance of high school chemistry teaching books,and a series of related data,and communicate with subject expert and a line of chemistry teacher discussion,determine the 12 cognitive nature of the knowledge of chemical equilibrium,on the basis of matrix theory,based on the Q to meet the needs of research,compiled the chemical equilibrium cognitive diagnostic survey questionnaire.Then,547 senior high school students from a standardized school and an ordinary high school in shandong province were selected as research objects to carry out chemical balance cognitive diagnostic examination,collect and process research data,and analyze and process data based on DINA model with R language software package and SPSS21.0 software.Answers based on the results of descriptive statistics,DINA model parameter estimation,analysis of the cognitive properties and the individual cognitive diagnostic analysis,to explore the cognitive development of the chemical equilibrium were test,based on the diagnosis research conclusions,according to the research conclusion is given teaching advice,to develop specific chemical equilibrium remedial teaching to provide the basis.Finally,based on the reflection and prospect of this study,the problems that need to be further solved in this study are put forward.Studies have shown that:(1)Most of the subjects have difficulty learning the cognitive factors C9 "influence factors of chemical equilibrium constants".(2)The cognitive attribute mastering mode of the participants is relatively concentrated in 10 cognitive attribute masteringmodes.(3)The diagnostic information obtained by the actual cognitive attribute mastering mode of the subject is better than the single total score.The innovations of this research are mainly reflected in the following: First,the chemical balance cognitive diagnosis questionnaire was compiled,which provided a new tool for future research on chemical balance cognitive diagnosis.Secondly,the students were The mastery of the chemical equilibrium cognitive attributes provides a new basis for the subsequent teaching practice of chemical balance knowledge.